Android 自定义 斜线进度框 ，雨点式背景

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;

import java.util.Random;

/**
 * 斜线进度条
 * author : stone
 * email  : [email protected]
 * time   : 15/10/22 11 11
 */
public class ObliqueProgressbar extends View {

    private Paint mPaint;
    private float mProgress;

    public ObliqueProgressbar(Context context) {
        this(context, null);
    }

    public ObliqueProgressbar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ObliqueProgressbar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        mPaint = new Paint();
        mPaint.setAntiAlias(true);
    }


    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        if (mProgress == 0) return;

        //碎片雨
        mPaint.setColor(Color.parseColor("#a96ecb"));
        mPaint.setStrokeWidth(3);
        Random random = new Random();
        int sx, sy;
        for (int i = 0; i < 200; i++) {
            sx = random.nextInt(getWidth() + 10);
            sy = random.nextInt(getHeight() + 10);
//            canvas.drawLine(sx, sy, sx+random.nextInt(5), sy+random.nextInt(5), mPaint);
            canvas.drawCircle(sx, sy, random.nextInt(5) + 1, mPaint);
        }

        //进度
        mPaint.setColor(Color.parseColor("#6AFFFFFF"));
        mPaint.setStrokeWidth(15);
        float x = mProgress * getWidth();
        for (int i = 0; i < x; i += 30) {
            canvas.drawLine(i - 30, -10, i + 30, getHeight() + 10, mPaint);
        }

    }

    public void setProgress(float progress) {
        this.mProgress = progress;
        invalidate();
    }
}import android.content.Context;
import